Mini Boom YouTube Audio Visual Mount System

I use these to film YouTube videos. Print what you need and assemble.  I mostly used 5/16th inch threaded rod, nuts and bolts . Some 1/4 inch carriage bolts are used for camera mount threads if needed. I used pennies in the counterweights but sand, lead shot, washers, BBs or anything else will do. Use supports for the knobs with nut cutouts. Tap the nuts in with a hammer or press them in with a vise. The bases fit into one inch bore dumbell weights. The weight holes vary a lot. You may have to shim or you can use the expanding plug I designed. 5/16 inch rod can be bought in three foot lengths for about $4.  2 inch long 5/16 inch bolts and nuts are a few cents each. I buy them by the pound for $3 a pound.